Giving instructions 讲授 Special feature 具体特征
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Communication 交际 Introducing a colleague 介绍同事
Reserving a flight 预订航班 Giving class of ticket把预订的机座等级告诉对方
Starting a product presentation 推介产品 Background to the company 介绍背景情况
Making a formal presentation 正式演讲 Moving to the second 谈第二点
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